<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="<c:url value='/EncodingServlet?username=张三'/>">GET请求设置编码问题</a>
<br><br>
<form action="<c:url value='/EncodingServlet'/>" method="POST">
 用户名：<input type="text" name="username" value="张三">
 <input type="submit" name="submit" value="提交">
</form> 
</body>
</html>